//指定數據中心的驗證表單valiForm，驗證規則rules
<el-form :model="valiForm" :rules="rules" ref="valiForm" label-width="100px" class="demo-valiForm">

  <el-form-item label="名稱：" :label-width="formLabelWidth" prop='name'>
   <el-input v-model="valiForm.name"></el-input>
  </el-form-item>

</el-form>

//add('valiForm')方法要傳驗證表單名
<el-button type="primary" @click="add('valiForm')">確 定</el-button>

data () {
 let nameRule1 = (rule, value, callback) => {
  let regExp = //;
  if (regExp.test(value) === false) {
   callback(new Error('不通過正則'));
  } else {
   callback();
  }
 };

 return {
  valiForm: {
   name: ''
  },
  rules: {
   name: [
   { required: true, message: '請輸入名稱', trigger: 'blur' },
   { min: 5, max: 10, message: '長度在 5 到 10 個字符', trigger: 'blur' },
   { validator: nameRule1, trigger: 'blur' }
   ]
  }

 };
 },

methods:{
 add(formName) {
  this.$refs[formName].validate((valid) => {
  if (valid) {
   //通過驗證執行
  } else {
   //驗證失敗執行
   console.log('error submit!!');
   return false;
  }
  });
 }
}